Expected value, variance, standard deviation
Not what you're looking for?
Shown is a probability distribution for the random variable
x f(x)
3 0.25
6 0.50
9 0.25
Total 1.00
a. Compute E(x), the expected value of x.
b. Compute o^2, the variance of X
c. Compute o, the standard deviation of X.
Purchase this Solution
Solution Summary
The expected value, variance, and the standard deviation are calculated given the probability distribution for the random variable.
Solution Preview
Please see attached file.
Shown is a probability distribution for the random variable
x f(x)
3 0.25
6 0.50
9 0.25
Total 1.00
a. Compute ...
Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.